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Data associated with toxicant applications for brown treesnake control
This file describes three datasets used to evaluate individual traits in brown treesnakes and how they affect susceptibility to toxicant applications. This file references three data sets that include 'Guam GROUND', SURVTOX', and 'HMU NWFN TRT.' Guam GROUND reference to snakes encountered during visual surveys on Guam and whether they were located on the ground or arboreal. SURVTOX refers to a known fate study of telemetered snakes that either survived or died during an application of toxic baits. HMU NWFN TRT refers to the demography of snakes captured pre and post-toxicant treatment. The specific details of toxicant treatments and survey methods are described in the associated manuscript: Nafus et al. 2019. Behavior, size, and body condition predict susceptibility to management and reflect post-treatment frequency shifts in an invasive snake. Global Ecology and Conservation: 21: e00834.
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Failed Brown Treesnake bait cartridges from an aerially application in Guam, 2018
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The dataset contains 6 columns of data collected during line transect surveys (Line) that evaluated bait cartridge efficacy for Brown Treesnake control on Guam. Two-person teams recorded all bait cartridges observed while walking the center line of transects in the Habitat Management Unit (HMU). Perpendicular distance (DIST (m)) to cartridges from center line was measured to the nearest 0.005 meters.
Brown Treesnake Mortality HMU Guam 2019
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The dataset contains 16 columns of data collected on invasive Brown Treesnakes (Boiga irregularis) at a study site known as the Habitat Management Unit (HMU) in northern Guam. Snakes were fitted with radio-transmitters and teams of 2-4 biologist listened for signals from transmitters every seven days to determine if snakes were alive or dead. Survival data was then modeled in Program MARK to assess the effect of aerially applied toxic baits on snake mortality, including the effect of snake size covariates. In addition, this dataset contains snake capture information from reference sites on Guam that was used to demonstrate that our sample was representative of the size distribution in limestone forest habitat on Guam.
Brown Treesnake Mortality HMU Guam 2019
공공데이터포털
The dataset contains 16 columns of data collected on invasive Brown Treesnakes (Boiga irregularis) at a study site known as the Habitat Management Unit (HMU) in northern Guam. Snakes were fitted with radio-transmitters and teams of 2-4 biologist listened for signals from transmitters every seven days to determine if snakes were alive or dead. Survival data was then modeled in Program MARK to assess the effect of aerially applied toxic baits on snake mortality, including the effect of snake size covariates. In addition, this dataset contains snake capture information from reference sites on Guam that was used to demonstrate that our sample was representative of the size distribution in limestone forest habitat on Guam.
Airsoft electric gun evaluation on Brown Treesnakes, Guam, 2016
공공데이터포털
The data set consists of 2 spreadsheets from Airsoft Electric Gun (AEG) trials on brown treesnakes. AEG snake wound data contains AEG results from guns equipped with 0.39 gram ammunition (plastic pellets ) that were fired at dead and live snakes from distances of 4, 8, and 12 m to measure tissue-penetration depth, and noted if (a) the pellet was lodged inside the peritoneal cavity, (b) the pellet had completely passed through and left the body, (c) the pellet appeared to have damaged the vertebral column, (d) ribs were broken, and (e) any internal organs appeared to be damaged. AEG live snake ballistic data contains information on limited AEG trials with live snakes shot at distances of 4, 8, and 12 m and their behavioral responses when hit with 0.39 gram ammunition.
Guam, Morphometric and height data for brown treesnakes were detected at four sites on Guam, 2006 - 2023
공공데이터포털
These data were collected as part of several studies or efforts to remove brown treesnakes (Boiga irregularis) across three sites located in Guam, USA and one site in Cocos Island (Dano), Guam, USA. The various goals of projects were distinct and these data were applied to a more intensive, cross site comparison on the height snakes were detected during visual surveys as a function of their size or body condition.
Guam, Morphometric and height data for brown treesnakes were detected at four sites on Guam, 2006 - 2023
공공데이터포털
These data were collected as part of several studies or efforts to remove brown treesnakes (Boiga irregularis) across three sites located in Guam, USA and one site in Cocos Island (Dano), Guam, USA. The various goals of projects were distinct and these data were applied to a more intensive, cross site comparison on the height snakes were detected during visual surveys as a function of their size or body condition.
Demographic data for toxicant based trial eradication of brown treesnakes in the USGS Closed Population on Guam, 2016 - 2020
공공데이터포털
These data are mark-recapture data procured from conducting nocturnal visual surveys and live lure based trapping for brown treesnakes in the 5 hectare enclosure called USGS Closed Population or Northwest Field North (NWFN). In addition, tissue samples were collected from brown treesnakes in order to build genetic relationships among resident individuals. The population was undergoing acetaminophen based toxicant treatment from March 31 2017 - February 29 2020. Monitoring occurred from 15 October 2016 - 31 March 2020. The data file contains four sheets that report data from different pieces of the demographic response to toxicant applications. Sheet 1 "BTS Counts" reports the number of brown treesnakes known to be in the population on a given date. Sheet 2 "IPM" reports demographic values that were used to inform an integrated projection model to estimate population response, elasticity and sensitivity to toxicants. Sheet 3 "Parents" defines and identifies parental relationships between within the 2017 - 2018 cohort of births to other known snakes in the population. "Snakes Removed" gives the numerical estimate of the number of snakes that were assumed to be have killed by a given toxicant application following failure to subsequently detect them.
Demographic data for toxicant based trial eradication of brown treesnakes in the USGS Closed Population on Guam, 2016 - 2020
공공데이터포털
These data are mark-recapture data procured from conducting nocturnal visual surveys and live lure based trapping for brown treesnakes in the 5 hectare enclosure called USGS Closed Population or Northwest Field North (NWFN). In addition, tissue samples were collected from brown treesnakes in order to build genetic relationships among resident individuals. The population was undergoing acetaminophen based toxicant treatment from March 31 2017 - February 29 2020. Monitoring occurred from 15 October 2016 - 31 March 2020. The data file contains four sheets that report data from different pieces of the demographic response to toxicant applications. Sheet 1 "BTS Counts" reports the number of brown treesnakes known to be in the population on a given date. Sheet 2 "IPM" reports demographic values that were used to inform an integrated projection model to estimate population response, elasticity and sensitivity to toxicants. Sheet 3 "Parents" defines and identifies parental relationships between within the 2017 - 2018 cohort of births to other known snakes in the population. "Snakes Removed" gives the numerical estimate of the number of snakes that were assumed to be have killed by a given toxicant application following failure to subsequently detect them.
Guam, Andersen Air Force Base housing area visual surveys for brown treesnakes (Boiga irregularis) and associated tree data, December 2019–November 2022.
공공데이터포털
This data was collected as part of a larger project to examine predator-prey interactions between invasive Brown Treesnakes (Boiga irregularis, predator) and native prey species at a study site located in a peri-urban area of Andersen Air Force base in Guam, USA. This dataset includes two datasets. One dataset contains 22 columns and includes data collected on Brown Treesnakes captured between 23 December 2019 and 03 October 2022 during nocturnal surveys. The second dataset that contains 10 columns that describe 1240 individual trees at the study site that served as our sampling unit for the surveys.
Guam, Andersen Air Force Base housing area visual surveys for brown treesnakes (Boiga irregularis) and associated tree data, December 2019–November 2022.
공공데이터포털
This data was collected as part of a larger project to examine predator-prey interactions between invasive Brown Treesnakes (Boiga irregularis, predator) and native prey species at a study site located in a peri-urban area of Andersen Air Force base in Guam, USA. This dataset includes two datasets. One dataset contains 22 columns and includes data collected on Brown Treesnakes captured between 23 December 2019 and 03 October 2022 during nocturnal surveys. The second dataset that contains 10 columns that describe 1240 individual trees at the study site that served as our sampling unit for the surveys.